1023869155 has 8 divisors (see below), whose sum is σ = 1239915600. Its totient is φ = 811580256.

The previous prime is 1023869153. The next prime is 1023869191. The reversal of 1023869155 is 5519683201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1023869155 - 2¹ = 1023869153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1023869153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938785 + ... + 939874.

It is an arithmetic number, because the mean of its divisors is an integer number (154989450).

Almost surely, 2^1023869155 is an apocalyptic number.

1023869155 is a deficient number, since it is larger than the sum of its proper divisors (216046445).

1023869155 is a wasteful number, since it uses less digits than its factorization.

1023869155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878773.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 1023869155 is about 31997.9554815616. The cubic root of 1023869155 is about 1007.8939072618.

The spelling of 1023869155 in words is "one billion, twenty-three million, eight hundred sixty-nine thousand, one hundred fifty-five".